Robert Haas escribió:
> On Thu, Nov 5, 2009 at 9:01 AM, Peter Eisentraut <peter_e@gmx.net> wrote:
> > Or as table constraint
> >
> > EXCLUSIVE (a, b) BY =
> >
> > And then you could think of UNIQUE as "EXCLUSIVE BY default-equals-op".
> >
> > EXCLUSIVE is already a key word, by the way.
>
> Ooh, that's kind of neat. But I think you'd need EXCLUSIVE (a, b) BY
> (=, =), since it could equally well be EXCLUSIVE (a, b) BY (=, &&).
Perhaps EXCLUSIVE (a BY =, b BY =)
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